Actuarial Notes

SOA Exam ASTAM Sample Question 17

Study guide: Exam ASTAM

You are given the following data from a sample of 6 claims. The ground up loss for the risk is assumed to be exponential with mean \theta.

Loss Amount Modification
120 None
640 None
700 None
820 $100 deductible
1220 $100 deductible
1500 Censored at $1500

Part a

Write down the likelihood function for this sample and simplify as far as possible.

Part b

Show that the Maximum Likelihood Estimate of the parameter \theta is \hat{\theta} = 960.

Part c

Estimate the standard deviation of \hat{\theta} using Cramer-Rao lower bound.

Part d

Let Y be the random variable representing the insured loss amount per claim with a limit of $1000 and no deductible. Use your fitted model to estimate E[Y].

Part e

Using the delta method, construct an approximate 80% confidence (as printed) for E[Y].

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Concepts tested

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